Take control of your finances with clear, personal support
When you’re self-employed, time is money. Chasing receipts, stressing over tax, and wondering if you’ve missed something shouldn’t be part of your daily routine. At Simplex, we offer expert bookkeeping for self-employed professionals across the UK. Our service is built to save you time, reduce your tax bill, and keep your finances on track.
Always Up to Date
Your books stay accurate and organised with monthly summaries that show exactly where your business stands.
Pay Less Tax
We help you claim every allowable expense, so you keep more of what you earn and avoid costly mistakes.
Unlimited Support
Reach out by phone, email or WhatsApp whenever you need help. Quick replies, no hidden costs.
What’s Included in Our Services
We handle the details so you don’t have to worry about deadlines or mistakes.
✅ Bookkeeping done for you
✅ Real-time expense tracking
✅ Monthly check-ins and reporting
✅ Tools set up for how you work
✅ Unlimited support from your own accountant
✅ Fixed monthly price with no hidden fees
“Simplex are super easy to work with. I love that I have a portal to track all documents and paperwork that need my attention. Everything else just seems to run in the background so I can focus on my business“
Jordan, Designer
Fully Remote, Fully Supported
We work with self-employed clients all across the UK. Everything is handled online, and you’ll always be able to reach your accountant directly.
We don’t believe in generic advice or slow replies. You’ll have one point of contact, clear communication, and total confidence in your numbers
Why Businesses Choose Simplex
✨ Personal support from your own dedicated accountant
✨ Unlimited calls, texts and emails included in every plan
✨ Clear, fixed monthly pricing with no surprise fees
✨ Award-winning team trusted by sole traders across the UK
✨ Easy, reliable bookkeeping with all the tools set up for you
Simplex makes bookkeeping easy, efficient and stress-free.
“Lucy’s help for my business is invaluable. Knowing I don’t need to worry about my bookkeeping or tax returns means I can focus on growing my business.“
Susan-Marie, Marketing
Smart Tools, Simple Invoicing
We set you up with easy, reliable tools so your finances stay organised without adding to your to-do list. Everything is customised for the way you work, and we’re always here if you need help.
Xero
Stay organised without spreadsheets.
See your income, expenses and invoices in one place, always up to date and ready when you need it.
dext
No more chasing receipts.
Snap a photo or forward an email, and your bills and receipts are stored, sorted and matched to your accounts.
brightpay
Stress-free payroll.
Payslips, pensions and submissions are taken care of, always on time and fully compliant with HMRC
Getting Started is Easy!
We’ve made it simple for you to get the help you need:
Book a Free Call
Tell us about your business and what you need.
Send Your Info
Share your financial details securely online.
We Do the Work
We’ll sort your accounts and keep everything up to date.
Stay in Control
Get updates and support, so you always know where you stand.
Book your free discovery call! It will only take a minute
Time to Switch Accountants?
You don’t need to stay stuck with support that’s slow or confusing. Switching to Simplex is smooth and handled for you.
Seamless Transfer
We contact your previous accountant and securely move everything over, CIS, VAT, payroll and more.
No Disruption
Your accounts stay up to date while we handle the switch, so nothing gets missed.
A Fresh Start
We review your numbers, identify gaps, and get you set up with a clear plan that works for you.
Ready to switch? Let’s make it happen.
Helpful Resources
Your Questions, Answered
We know you might have some questions, and we’re here to make everything as clear and straightforward as possible. If you need more information, don’t hesitate to reach out—we’re always happy to help!
It’s not a legal requirement, but many sole traders find a bookkeeper incredibly helpful. It saves time, prevents errors, and keeps finances in order for HMRC. If you’re spending hours on receipts and spreadsheets, a bookkeeper can free you up to focus on growing your business.
To stay below the 40% tax bracket, make sure you’re claiming all allowable expenses and using tax reliefs like pension contributions. You might also benefit from setting up a limited company. A qualified accountant can help you plan your income and keep your tax bill as low as possible.
You’ll need strong bookkeeping skills, a recognised qualification such as AAT or ICB, and to register with HMRC. You must also comply with anti-money laundering rules. Most bookkeepers use software like Xero or QuickBooks, so being confident with cloud tools is a big advantage.
Rates usually range from £20 to £40 per hour depending on experience and location. Some bookkeepers offer fixed monthly packages, which can work well for small business owners. It’s worth looking beyond price and choosing someone who adds real value to your business.
Common mistakes include not tracking expenses, missing deadlines, and mixing business with personal finances. Some also forget to set aside money for tax. Working with an accountant helps avoid these issues and gives you more confidence in your numbers.
The three golden rules of bookkeeping are: debit the receiver and credit the giver for personal accounts, debit what comes in and credit what goes out for real accounts, and debit expenses and losses while crediting income and gains for nominal accounts. These principles form the foundation of double-entry bookkeeping and help ensure your financial records are accurate and balanced.
